Flying-boat&#39;s hull



Dec- 1 1,5 l C. DORNIER FLYING BOAT S HULL Original Filed June 15, 1921 2 Sheets-Sheet l Dec. 1924. 1,518,640

I c. DO'RNIER FLYING BOATS HULL br Filed June 15, 1921 2 Sheets- Sheet 2 Fig.8.

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Patented Dec. 9, 1924.

UNITED STATES CLAUDIUS 'DORNIER,

PATENT OFFICE.

OF FRIEDRICHSHAFEN-ON-THE-BODENSEE, GERMANY, AS-

BIGH'OR TO THE FIRM: ZEPPELINWERK LINDAU, GESELLSCHAFT HIT IBESCHBANK- 'rnn HAITUNG, OF LINDAU-REUTIN, GERMANY.

FLYHVG-BOATS HULL.

Original application flied June 15, 1981, Serial 1T0. 477,848. Divided and this application filed Kay 10, 1924. Serial 170. 712,368.

Toallwhom it may concem:

Be it known that I, CLAUnrUs Donmnn, a citizen of Germany, residing at Friedrichshafen-on-the-Bodensee, Germany, have 6 invented certain new and useful Improvements in Flying-Boats Hulls, of which the following is a specification.

My. invention refers to flying machines and more especially to a flying boat of the type. in which fins or stump wings are mounted laterally of the boats hull and near the bottom thereof, in order to ensure an increased stability of the machine when restin on the surface of the water.

invention, these fins or stump wings taper in thickness. from the hull towards their other ends, in order to increase the lateral buoyancy when assuming a laterally inclined position, and the outer portion of each wing increases in thickness again, whereby the lateral buoyancy is increased still further.

In order to prevent the outer portions of the fins from being damaged by the impact of the waves, this portion may advantageously/have the form of a separate boats hull disengageably fixed to the fin or stump wing. This auxiliary boats hull not only protects the lateral edge of the fin against damage, but may also serve as life-saving means.

In the drawings aflixed to this specification and forming part thereof, two flying boats embodying my invention are illustratd diagrammatically by way of example.

In the drawings- Figs. 1 and 2 are a front elevation and plan view, respectively, the wing or bearing plane and the rear portions of the hull being 4- partly broken away.

Figs. 3 and 4 are similar views illustrating a second modification.

Referring first to Figs. 1 and 2, 1 is the boats hull, 2 is a self-supporting win mounted on and extending across said hu 3 and 4 are the motor and traction propeller, res ectively, mounted in front of the wing an 5, 5 are a pair of fins or stump wings extending laterally of and'near the bottom of .90 the hull. As shown in the drawings, these fins are thickest at their bases adjoining the lateral walls of the hull and their upper surfaces 6 extend substantially'in horizon- In t e flying boat according to the present tal direction. Their lower surfaces are inc'lined relatively to the horizontal, rising gradually in. outward direction. Near the outer edge, however, each fin again increases in thickness and the outer portion 8 may be substantially as thick or even thicker than the base portion.

In the modification illustrated in Figs. 3 and 4, the formation of the fins is substantially the same as shown in Figs. 1 and 2, however, the thickened outer portion is formed in this instance by a small boats hull 8 detachably fixed to the lateral edge of the fin, the upper surface of this hull extending in line with the upper surface of the fin, while the bottom 9 of the small boat projects somewhat below the lower lateral edge of the fin. As shown in Fig. 4, the lateral portion of each fin is shaped to correspond to the boats hull 8 mounted thereon, this latter thus forming a. smooth continuation of the fin without appreciably projecting therefrom.

As can easily be guessed from the drawings, the fins. being mounted on the hull in a position where their bases are slightly above the water line, will serve for securely stabilizing the boat a ainst lateral tilting, the displacement of t e fin gradually increasing in outward direction. However, the thickened outer portion of each. fin will touch the water earlier than the middle portion, whereby a still greater lateral buoyancy is obtained.

I wish it to be understood that I do not desire to be limited to the exact details of construction shown and described, for oband extending substantially horizontally in lateral direction, saidfin comprising a thick base portion, a thinner middle portion and a thick outer portion.

3. A flying boat comprising a boats hull, a fin mounted on each side wall of said hull and extending substantially horizontally in lateral direction, the up er surface of said fin extending substantia horizontally, the lower surface first gradually rising and thereafter dropping again in lateral direction,vso as to form a with a thick base and outer portion and a thinner middle portion.

4. A flying boat comprisin a boats hull, a fin or stump win mounte on each side wall of said hull an decreasing in thickness in lateral direction, a boat-shaped hollow body being disengageably mounted laterally of each fin,-sa1d hollow body being thicker in vertical direction than" the adjoin- 15 in'g'portion' of said fin.

n testimony whereof I aifix'my signature.

7 'OLAUDIUS DORNIER. Witnesses:

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